EP0674042A1 - Metering device for the head box of a paper machine - Google Patents

Metering device for the head box of a paper machine Download PDF

Info

Publication number
EP0674042A1
EP0674042A1 EP95102672A EP95102672A EP0674042A1 EP 0674042 A1 EP0674042 A1 EP 0674042A1 EP 95102672 A EP95102672 A EP 95102672A EP 95102672 A EP95102672 A EP 95102672A EP 0674042 A1 EP0674042 A1 EP 0674042A1
Authority
EP
European Patent Office
Prior art keywords
dosing device
headbox
metering
fluid
throttle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP95102672A
Other languages
German (de)
French (fr)
Other versions
EP0674042B1 (en
Inventor
Klaus Lehleiter
Rudolf Münch
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Voith Patent GmbH
Original Assignee
Voith Sulzer Papiermaschinen GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Voith Sulzer Papiermaschinen GmbH filed Critical Voith Sulzer Papiermaschinen GmbH
Publication of EP0674042A1 publication Critical patent/EP0674042A1/en
Application granted granted Critical
Publication of EP0674042B1 publication Critical patent/EP0674042B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/022—Means for injecting material into flow within the headbox
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/02—Head boxes of Fourdrinier machines
    • D21F1/026—Details of the turbulence section
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/06—Regulating pulp flow
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F1/00—Wet end of machines for making continuous webs of paper
    • D21F1/08—Regulating consistency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/12—Seasoning

Definitions

  • headboxes are used to generate a suspension jet in a paper machine, which is then dewatered on the paper machine screen. For this purpose, a large amount of stock suspension is passed through the headbox. It is also known that in many cases there is the possibility, through the local addition of further liquid, in particular addition of water or removal of the stock suspension, of carrying out changes in the composition or flow in the stock suspension in individual zones, viewed across the headbox. As a result, the quality of the sheet produced can be improved and regulated locally.
  • control options are all the more effective the more points are available for adding or removing a fluid, based on the working width of the headbox.
  • a variety of e.g. Hoses and valves must be available and installed, which is expensive and makes the machine more susceptible to faults and confusing. The problem of considerable effort arises in order to achieve a high quality of the sheet produced.
  • the object of the present invention is to accomplish the locally adjustable addition or removal of a fluid at different points in the headbox with less effort than before and, if necessary, to enable the greatest possible number of such addition or removal points.
  • a single connection per chamber is sufficient to connect the headbox with the external media-carrying lines.
  • the main application of the invention is likely to be the addition of a fluid with a consistency different from the stock suspension, which is of the same quality over the entire area of the headbox. What is meant is that although the amount of fluid added varies depending on the point of addition, the composition of the fluid is the same. In such cases, a single chamber is sufficient for the entire width.
  • An example would be the setting of the mass cross profile or the fiber orientation, in which dilution water is added in a controlled manner and in different doses across the width. Even if the removal of part of the suspension in the headbox is aimed for, a single chamber is usually sufficient.
  • the actuating devices for the throttle devices will be installed outside the chamber and in an easily accessible manner. They can be adjusted manually or by motor. To check the function of the dosing device, a transparent wall is helpful, especially since the fluid is clear water in many cases.
  • the metering device according to the invention can be a single or multi-layer headbox.
  • FIG. 2 shows the metering device in a view from above, again with chamber 6, actuating devices 8 (only a few shown) for the throttle device and a connector 11 which is attached to chamber 6 in order to either supply fluid (arrow 12) or suspension to be able to dissipate (arrow 12 ').
  • actuating devices 8 Due to the fact that metering openings located next to one another are arranged offset (9 or 9 'in Figure 1), the actuating devices 8 can also be offset, which makes them easier to assemble and more accessible, even if the metering points are to be close together.
  • the flow channels 2 are shown in dashed lines in FIG. 2, and the line 10 with its connections to flow channels lying transversely next to it are indicated. It is shown by way of example that the line 10 can connect a row of flow channels lying one above the other or two rows of this type on both sides. The latter variant is particularly useful when the headbox is subdivided into many adjacent flow channels.
  • the lines 10 can be designed as bores in a block 15 accommodating the flow channels 2, which cut the channels 2 directly and thus very easily establish the connections.
  • FIGS. 5a and 5b show a schematic side view of the throttle device with a rotatable asymmetrical sealing disk 13 ', the function of which is explained in FIGS. 5a and 5b.
  • Such embodiments have the advantage that the actuation of the throttle device 4 is made possible by a rotary movement, which represents a reduction in cost for servomotors compared to a pushing movement.
  • FIGS. 5a and 5b One can throttle very sensitively if the sealing disk 13 ', as shown in FIGS. 5a and 5b, has an opening 16 which is introduced eccentrically to the fulcrum. As a result of the rotation of the disc, the metering opening 9 is more or less covered. It can also be advantageous to keep a residual area open regardless of the setting, because a constant fluid flow significantly reduces the risk of clogging in the lines.
  • Fig. 5 a shows such a position
  • Fig. 5 b shows the maximum opening.
  • FIG. 6 shows a similar special form of the throttle device, in which the metering opening e.g. is an elongated hole 9 "and the throttle device has a rotatable sealing disk 13, the outer contour of which is radially asymmetrical with respect to the axis of rotation, so that the free opening of the elongated hole 9" can be changed during rotation.
  • the metering opening e.g. is an elongated hole 9 "and the throttle device has a rotatable sealing disk 13, the outer contour of which is radially asymmetrical with respect to the axis of rotation, so that the free opening of the elongated hole 9" can be changed during rotation.

Landscapes

  • Paper (AREA)
  • Photographic Developing Apparatuses (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

A dosing appts. (5) for addn. or removal of fluids to or from a paper machine applicator (1) has at least two openings with a transverse spacing connected to at least one applicator chamber into which the paper pulp flows during operation. The dosing appts. has at least one fluid reception chamber (6) contg. dosage openings (9,9',9'') equipped with adjustable throttle devices (4) to control the dosage of the added or removed fluid.

Description

Bekanntlich werden Stoffaufläufe verwendet, um bei einer Papiermaschine einen Suspensionsstrahl zu erzeugen, der anschließend auf dem Papiermaschinensieb entwässert wird. Hierzu wird eine große Menge von Stoffsuspension durch den Stoffauflauf hindurchgeführt. Es ist auch bekannt, daß in vielen Fällen durch lokale Zugabe von weiterer Flüssigkeit, insbesondere Zugabe von Wasser oder Abfuhr der Stoffsuspension, Möglichkeiten bestehen, um - quer über den Stoffauflauf betrachtet - an einzelnen Zonen Veränderungen der Zusammensetzung oder Strömung in der Stoffsuspension vorzunehmen. Dadurch kann die Qualität des erzeugten Blattes lokal verbessert und geregelt werden.It is known that headboxes are used to generate a suspension jet in a paper machine, which is then dewatered on the paper machine screen. For this purpose, a large amount of stock suspension is passed through the headbox. It is also known that in many cases there is the possibility, through the local addition of further liquid, in particular addition of water or removal of the stock suspension, of carrying out changes in the composition or flow in the stock suspension in individual zones, viewed across the headbox. As a result, the quality of the sheet produced can be improved and regulated locally.

Die genannten Regelmöglichkeiten sind umso wirksamer, je mehr Stellen zur Zugabe oder Abfuhr eines Fluids vorhanden sind, bezogen auf die Arbeitsbreite des Stoffauflaufes. Es müssen daher eine Vielzahl von z.B. Schläuchen und Ventilen vorhanden und montiert sein, was teuer ist und die Maschine störanfälliger und unübersichtlich macht. Es ergibt sich also das Problem eines beträchtlichen Aufwands, um eine hohe Qualität des erzeugten Blattes zu erzielen.The above-mentioned control options are all the more effective the more points are available for adding or removing a fluid, based on the working width of the headbox. A variety of e.g. Hoses and valves must be available and installed, which is expensive and makes the machine more susceptible to faults and confusing. The problem of considerable effort arises in order to achieve a high quality of the sheet produced.

Die Aufgabe der vorliegenden Erfindung liegt darin, mit geringerem Aufwand als bisher die lokal einstellbare Zugabe oder Abfuhr eines Fluids an verschiedenen Stellen des Stoffauflaufes zu bewerkstelligen und dabei, wenn erforderlich, eine möglichst große Anzahl solcher Stellen zur Zugabe oder Abfuhr zu ermöglichen.The object of the present invention is to accomplish the locally adjustable addition or removal of a fluid at different points in the headbox with less effort than before and, if necessary, to enable the greatest possible number of such addition or removal points.

Diese Aufgabe wird durch das Kennzeichen im Anspruch 1 in vollem Umfang gelöst.This object is fully achieved by the characterizing part in claim 1.

Die nachfolgenden Unteransprüche beschreiben vorteilhafte Ausführungsformen des Erfindungsgegenstandes.The following subclaims describe advantageous embodiments of the subject matter of the invention.

Dadurch, daß die Zugabe oder der Abzug des Fluids statt durch Einzelleitungen über Kammern erfolgt, genügt ein einziger Anschluß pro Kammer zur Verbindung des Stoffauflaufes mit den externen medienführenden Leitungen. Die Hauptanwendung der Erfindung dürfte die Zugabe von einem Fluid mit von der Stoffsuspension abweichender Stoffdichte sein, welches über den gesamten Bereich des Stoffauflaufes von gleicher Qualität ist. Gemeint ist, daß zwar die Menge des zugegebenen Fluids je nach Zugabeort unterschiedlich, die Zusammensetzung des Fluids aber gleich ist. In solchen Fällen genügt eine einzige Kammer für die gesamte Breite.The fact that the addition or removal of the fluid instead of through individual lines Chambers occurs, a single connection per chamber is sufficient to connect the headbox with the external media-carrying lines. The main application of the invention is likely to be the addition of a fluid with a consistency different from the stock suspension, which is of the same quality over the entire area of the headbox. What is meant is that although the amount of fluid added varies depending on the point of addition, the composition of the fluid is the same. In such cases, a single chamber is sufficient for the entire width.

Als Beispiel wäre die Einstellung des Massenquerprofils oder der Faserorientierung zu nennen, bei der geregelt und über die Breite unterschiedlich dosiert Verdünnungswasser zugegeben wird. Auch wenn die Abfuhr eines Teils der im Stoffauflauf geführten Suspension angestrebt wird, ist in der Regel eine einzige Kammer ausreichend.An example would be the setting of the mass cross profile or the fiber orientation, in which dilution water is added in a controlled manner and in different doses across the width. Even if the removal of part of the suspension in the headbox is aimed for, a single chamber is usually sufficient.

Denkbar sind auch, in Stromrichtung gesehen, mehrere Kammern anzubringen, um unterschiedliche Qualitäten zugeben zu können.It is also conceivable, when viewed in the direction of the current, to install several chambers in order to be able to add different qualities.

In der Regel werden die Betätigungsvorrichtungen für die Drosselvorrichtungen außerhalb der Kammer und gut zugänglich angebracht sein. Sie können manuell oder motorisch verstellbar sein. Zur Kontrolle der Funktion der Dosiervorrichtung ist eine durchsichtige Wandung hilfreich, zumal das Fluid in vielen Fällen klares Wasser ist.As a rule, the actuating devices for the throttle devices will be installed outside the chamber and in an easily accessible manner. They can be adjusted manually or by motor. To check the function of the dosing device, a transparent wall is helpful, especially since the fluid is clear water in many cases.

Die Erfindung und ihre Vorteile werden erläutert anhand von Zeichnungen. Dabei zeigen

Figur 1
eine erfindungsgemäße Dosiervorrichtung in Seitenansicht am geschnitten dargestellten Stoffauflauf
Figur 2
eine erfindungsgemäße Dosiervorrichtung in Ansicht von oben
Figur 3
spezielle Leitungen für das Fluid
Figur 4
eine weitere Ausführungsform der Drosselvorrichtung
Fig. 5a, 5b
Details einer Drosselvorrichtung
Fig. 6
Details einer anderen Drosselvorrichtung
In Figur 1 erkennt man den Teil eines Papiermaschinen-Stoffauflaufes 1, hier mit mehreren, senkrecht zur Strahlebene angeordneten Strömungskanälen 2. Versorgt wird der Stoffauflauf durch einen Verteilerraum 3, aus den zur Papiererzeugung gedachte Suspension - Pfeile 7 - in die Strömungskanäle 2 einfließen kann. Auf den Stoffauflauf ist die Dosiervorrichtung 5 aufgesetzt. Sie besteht im wesentlichen aus der Kammer 6 und den Drosselvorrichtungen 4. Eine jede Drosselvorrichtung läßt sich hier durch eine entsprechend zugeordnete Betätigungsvorrichtung 8 einstellen. Auf diese Weise kann durch die Dosieröffnungen 9 und 9'das in der Kammer 6 geführte Fluid in der gewünschten Menge zugeführt werden, bzw. Suspension aus dem Stoffauflauf dosiert abgeführt werden. Der in Figur 1 gezeigte kegelförmige Dichtkörper 14, der mit einem kegelförmigen Sitz in der Dosieröffnung 9 bzw. 9' zusammenwirkt, benötigt sehr wenig Platz. Betätigt wird eine solche Drosselvorrichtung durch eine Hub-/Senk-Bewegung oder Schraubbewegung. Man erkennt auch, daß - ausgehend von der Dosieröffnung 9 - eine Leitung 10, die im wesentlichen senkrecht zur Strahlebene steht, eine Verbindung schafft zu den Strömungskanälen 2.The invention and its advantages are explained with reference to drawings. Show
Figure 1
a metering device according to the invention in side view on the headbox shown in section
Figure 2
a metering device according to the invention in top view
Figure 3
special lines for the fluid
Figure 4
a further embodiment of the throttle device
5a, 5b
Details of a throttle device
Fig. 6
Details of another throttle device
In FIG. 1, the part of a paper machine headbox 1 can be seen, here it is supplied with a plurality of flow channels 2 arranged perpendicular to the jet plane the headbox through a distribution space 3, from which the suspension intended for paper production - arrows 7 - can flow into the flow channels 2. The metering device 5 is placed on the headbox. It essentially consists of the chamber 6 and the throttle devices 4. Each throttle device can be adjusted here by a correspondingly assigned actuating device 8. In this way, the fluid in the chamber 6 can be supplied in the desired amount through the metering openings 9 and 9'd, or the suspension can be metered out of the headbox. The conical sealing body 14 shown in FIG. 1, which cooperates with a conical seat in the metering opening 9 or 9 ', requires very little space. Such a throttle device is actuated by a lifting / lowering movement or screwing movement. It can also be seen that - starting from the metering opening 9 - a line 10, which is essentially perpendicular to the jet plane, creates a connection to the flow channels 2.

Es ist ohne weiteres denkbar, die erfindungsgemäße Dosiervorrichtung an einem Stoffauflauf anzubringen, indem die Stoffsuspension anders, als hier gezeigt, geführt wird, also insbesondere nicht in Stufendiffusor-Strömungskanälen. Für die Vorteile, die sich aus der erfindungsgemäßen Dosiervorrichtung ergeben, spielt das keine entscheidende Rolle. Es kann ein Ein- oder auch Mehrschichtstoffauflauf sein.It is readily conceivable to attach the metering device according to the invention to a headbox by guiding the stock suspension differently than shown here, that is to say in particular not in step diffuser flow channels. This does not play a decisive role for the advantages that result from the metering device according to the invention. It can be a single or multi-layer headbox.

Die Figur 2 zeigt die Dosiervorrichtung in der Ansicht von oben, wiederum mit Kammer 6, Betätigungsvorrichtungen 8 (nur einige gezeichnet) für die Drosselvorrichtung sowie einem Anschlußstück 11, das an der Kammer 6 angebracht ist, um entweder Fluid zuzuführen (Pfeil 12) oder Suspension abführen zu können (Pfeil 12'). Dadurch daß nebeneinander liegende Dosieröffnungen versetzt angeordnet sind (9 bzw. 9' in Figur 1), können die Betätigungsvorrichtungen 8 ebenfalls versetzt sein, wodurch sie leichter montierbar und besser zugänglich sind, auch wenn die Dosierstellen dicht zusammen liegen sollen. Selbstverständlich ist es auch möglich, die Dosieröffnungen 9 und 9'unversetzt, also in einer Reihe, anzubringen. Es könnten dann auch lediglich die Betätigungsvorrichtungen 8 und Drosselvorrichtungen 4 schräg gestellt und versetzt sein.FIG. 2 shows the metering device in a view from above, again with chamber 6, actuating devices 8 (only a few shown) for the throttle device and a connector 11 which is attached to chamber 6 in order to either supply fluid (arrow 12) or suspension to be able to dissipate (arrow 12 '). Due to the fact that metering openings located next to one another are arranged offset (9 or 9 'in Figure 1), the actuating devices 8 can also be offset, which makes them easier to assemble and more accessible, even if the metering points are to be close together. Of course, it is also possible to dispense the metering openings 9 and 9 ′ in a row, that is to say in a row. In this case, only the actuating devices 8 and throttle devices 4 could also be set at an angle and offset.

In Figur 2 sind die Strömungskanäle 2 gestrichelt eingezeichnet, ferner ist die Leitung 10 mit ihren Verbindungen zu quer daneben liegenden Strömungskanälen angedeutet. Exemplarisch wird gezeigt, daß die Leitung 10 eine Reihe von übereinander liegenden Strömungskanälen anschließen kann oder auch beidseitig zwei solche Reihen. Letztgenannte Variante ist besonders bei feiner Unterteilung des Stoffauflaufes in viele nebeneinander liegende Strömungskanäle sinnvoll.The flow channels 2 are shown in dashed lines in FIG. 2, and the line 10 with its connections to flow channels lying transversely next to it are indicated. It is shown by way of example that the line 10 can connect a row of flow channels lying one above the other or two rows of this type on both sides. The latter variant is particularly useful when the headbox is subdivided into many adjacent flow channels.

Wie Figur 3 zeigt, könne bei entsprechenden Einbauverhältnissen die Leitungen 10 als Bohrungen in einem die Strömungskanäle 2 aufnehmenden Block 15 ausgeführt sein, die die Kanäle 2 direkt anschneiden und so sehr einfach die Verbindungen herstellen.As FIG. 3 shows, if the installation conditions are appropriate, the lines 10 can be designed as bores in a block 15 accommodating the flow channels 2, which cut the channels 2 directly and thus very easily establish the connections.

In Fig. 4 ist als schematische Seitenansicht die Drosselvorrichtung mit einer drehbaren unsymmetrischen Dichtscheibe 13' gezeigt, deren Funktion in den Fig. 5a und 5b erklärt ist. Solche Ausführungsformen haben den Vorteil, daß die Betätigung der Drosselvorrichtung 4 durch eine Drehbewegung ermöglicht wird, was für Stellmotore eine Verbilligung gegenüber einer Schubbewegung darstellt.4 shows a schematic side view of the throttle device with a rotatable asymmetrical sealing disk 13 ', the function of which is explained in FIGS. 5a and 5b. Such embodiments have the advantage that the actuation of the throttle device 4 is made possible by a rotary movement, which represents a reduction in cost for servomotors compared to a pushing movement.

Man kann sehr feinfühlig drosseln, wenn die Dichtscheibe 13', wie in Fig. 5a und 5b gezeigt, eine exzentrisch zum Drehpunkt eingebrachte Öffnung 16 aufweist. Infolge der Drehung der Scheibe wird die Dosieröffnung 9 mehr oder weniger bedeckt. Es kann auch günstig sein, unabhängig von der Einstellung in jedem Fall eine Restfläche geöffnet zu halten, weil ein ständiger Fluidstrom die Verstopfungsgefahr in den Leitungen wesentlich reduziert. Fig 5 a zeigt eine solche Stellung, Fig. 5 b die maximale Öffnung.One can throttle very sensitively if the sealing disk 13 ', as shown in FIGS. 5a and 5b, has an opening 16 which is introduced eccentrically to the fulcrum. As a result of the rotation of the disc, the metering opening 9 is more or less covered. It can also be advantageous to keep a residual area open regardless of the setting, because a constant fluid flow significantly reduces the risk of clogging in the lines. Fig. 5 a shows such a position, Fig. 5 b shows the maximum opening.

Die Figur 6 zeigt eine ähnliche spezielle Form der Drosselvorrichtung, bei der die Dosieröffnung z.B. ein Langloch 9'' ist und die Drosselvorrichtung eine drehbare Dichtscheibe 13 aufweist, deren Außenkontur radial unsymmetrisch zur Drehachse ist, so daß beim Drehen die freie Öffnung des Langlochs 9'' geändert werden kann.Figure 6 shows a similar special form of the throttle device, in which the metering opening e.g. is an elongated hole 9 "and the throttle device has a rotatable sealing disk 13, the outer contour of which is radially asymmetrical with respect to the axis of rotation, so that the free opening of the elongated hole 9" can be changed during rotation.

Claims (13)

Dosiervorrichtung (5) zum Zugeben oder Abführen von Fluiden in einen bzw. aus einem Stoffauflauf (1) einer Papiermaschine mit mindestens zwei mit Abstand in Querrichtung des Stoffauflaufes angeordneten Öffnungen, die jeweils mit wenigstens einem Raum des Stoffauflaufs verbunden sind, in dem im Betrieb Papierstoffsuspension fließt,
dadurch gekennzeichnet,
daß die Dosiervorrichtung (5) mindestens eine Kammer (6) zur Aufnahme des Fluids aufweist, die jeweils mehrere Dosieröffnungen (9, 9', 9'') enthält, die mit einstellbaren Drosselvorrichtungen (4) zur Dosierung des zugegebenen oder abgegebenen Fluids ausgestattet sind.Dosing device (5) for adding or discharging fluids into or from a headbox (1) of a paper machine with at least two openings arranged at a distance in the transverse direction of the headbox, each of which is connected to at least one space of the headbox, in the pulp suspension during operation flows,
characterized,
that the metering device (5) has at least one chamber (6) for receiving the fluid, each of which contains a plurality of metering openings (9, 9 ', 9'') which are equipped with adjustable throttle devices (4) for metering the added or dispensed fluid . Dosiervorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß sich die Kammer (6) über die gesamte Breite des Stoffauflaufs (1) erstreckt und eine Vielzahl von Dosieröffnungen (9, 9', 9'') enthält.Dosing device according to claim 1,
characterized,
that the chamber (6) extends over the entire width of the headbox (1) and contains a plurality of metering openings (9, 9 ', 9''). Dosiervorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß sie mehrere gegeneinander abgeteilte Kammern (6) zur Aufnahme des Fluides aufweist, die, über die Breite des Stoffauflaufes (1) gesehen, nebeneinander liegen.Dosing device according to claim 1,
characterized,
that it has a plurality of compartments (6), which are separated from one another, for receiving the fluid and which, seen across the width of the headbox (1), lie side by side. Dosiervorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß sie mehrere gegeneinander abgeteilte Kammern (6) zur Aufnahme des Fluides aufweist, die, über die Länge des Stoffauflaufes (1) gesehen, hintereinander liegen.Dosing device according to claim 1,
characterized,
that it has a plurality of mutually partitioned chambers (6) for receiving the fluid, which, seen over the length of the headbox (1), lie one behind the other. Dosiervorrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß innerhalb einer Kammer nebeneinander liegende Dosieröffnungen (9, 9', 9'') und zumindest Teile der jeweils dazugehörigen Drosselvorrichtungen (4), in Strömungsrichtung betrachtet, versetzt angeordnet sind.Dosing device according to one of claims 1 to 4,
characterized,
that metering openings (9, 9 ', 9'') lying next to one another and at least parts of the associated throttle devices (4), viewed in the flow direction, are arranged offset, within a chamber. Dosiervorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet,
daß ansteuerbare Stellmotoren zur Betätigung mindestens je einer Drosselvorrichtung (4) angebracht sind.Dosing device according to one of the preceding claims,
characterized,
that controllable servomotors for actuating at least one throttle device (4) are attached. Dosiervorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet,
daß die Drosselvorrichtung (4) einen axial verstellbaren kegelförmigen Dichtkörper (14) aufweist, der mit einem kegelförmigen Sitz in der Dosieröffnung (9, 9') zusammenwirkt.Dosing device according to one of the preceding claims,
characterized,
that the throttle device (4) has an axially adjustable conical sealing body (14) which interacts with a conical seat in the metering opening (9, 9 '). Dosiervorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet,
daß die Drosselvorrichtung (4) eine drehbare Dichtscheibe (13) aufweist, deren Außenkontur radial unsymmetrisch zur Drehachse ist, und die bezüglich einer Dosieröffnung (9'') so angeordnet ist, daß beim Drehen der unbedeckte Teil dieser Öffnung (9'') verändert wird.Dosing device according to one of the preceding claims,
characterized,
that the throttle device (4) has a rotatable sealing disk (13), the outer contour of which is radially asymmetrical with respect to the axis of rotation, and which is arranged with respect to a metering opening (9 '') in such a way that the uncovered part of this opening (9 '') changes when rotating becomes. Dosiervorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet,
daß die Drosselvorrichtung (4) eine drehbare Dichtscheibe (13') mit einer zur Drehachse exzentrischen Öffnung (16) aufweist, die bezüglich der zugehörigen Dosieröffnung (9'') so angeordnet ist, daß beim Drehen der unbedeckte Teil dieser Öffnung (9'') verändert wird.Dosing device according to one of the preceding claims,
characterized,
that the throttle device (4) has a rotatable sealing disk (13 ') with an opening (16) which is eccentric to the axis of rotation and which is arranged with respect to the associated metering opening (9'') such that the uncovered part of this opening (9'') ) is changed. Dosiervorrichtung (5) nach einem der vorstehenden Ansprüche für einen Stoffauflauf (1), der mehrere senkrecht zur Strahlebene angeordnete, sich in Strömungsrichtung erstreckende Strömungskanäle (2) für die Papierstoffsuspension aufweist,
dadurch gekennzeichnet,
daß die Verbindung zwischen den Dosieröffnungen (9, 9', 9'') und dem wenigstens einen Raum des Stoffauflaufs, in dem im Betrieb Papierstoffsuspension fließt, eine Leitung (10) ist, die im wesentlichen senkrecht zur Strahlebene verläuft und mit bestimmten Strömungskanälen (2) verbunden ist.Dosing device (5) according to one of the preceding claims for a Headbox (1) which has a plurality of flow channels (2) for the paper stock suspension which are arranged perpendicular to the jet plane and extend in the flow direction,
characterized,
that the connection between the metering openings (9, 9 ', 9'') and the at least one headbox space in which pulp suspension flows during operation is a line (10) which is essentially perpendicular to the jet plane and with certain flow channels ( 2) is connected. Dosiervorrichtung nach Anspruch 10,
dadurch gekennzeichnet,
daß die Leitung (10) zwischen zwei Reihen von senkrecht zueinander angeordneten Strömungskanälen (2) verläuft und mit zumindest einem Teil von diesen verbunden ist.Dosing device according to claim 10,
characterized,
that the line (10) runs between two rows of perpendicularly arranged flow channels (2) and is connected to at least part of them. Dosiervorrichtung nach Anspruch 11
dadurch gekennzeichnet,
daß die Leitung (10) als Bohrung in einem die Strömungskanäle (2) aufnehmenden Block (15) ausgeführt ist, derart, daß sie Strömungskanäle (2) so anschneidet, daß dadurch eine gewünschte fluidleitende Verbindung hergestellt wird.Dosing device according to claim 11
characterized,
that the line (10) is designed as a bore in a block (15) receiving the flow channels (2), in such a way that it cuts flow channels (2) in such a way that a desired fluid-conducting connection is thereby produced. Dosiervorrichtung nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet,
daß die Kammer (6) eine durchsichtige Begrenzungswand aufweist, die die Sicht auf die Drosselvorrichtungen (4) ermöglicht.Dosing device according to one of the preceding claims,
characterized,
that the chamber (6) has a transparent boundary wall, which allows a view of the throttle devices (4).
EP95102672A 1994-03-18 1995-02-24 Headbox of a paper machine Expired - Lifetime EP0674042B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4409415 1994-03-18
DE4409415A DE4409415C5 (en) 1994-03-18 1994-03-18 Metering device for a headbox of a paper machine

Publications (2)

Publication Number Publication Date
EP0674042A1 true EP0674042A1 (en) 1995-09-27
EP0674042B1 EP0674042B1 (en) 1998-10-21

Family

ID=6513241

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95102672A Expired - Lifetime EP0674042B1 (en) 1994-03-18 1995-02-24 Headbox of a paper machine

Country Status (7)

Country Link
US (1) US5900121A (en)
EP (1) EP0674042B1 (en)
JP (1) JPH0835189A (en)
AT (1) ATE172507T1 (en)
CA (1) CA2144922A1 (en)
DE (2) DE4409415C5 (en)
FI (1) FI112260B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998023812A1 (en) * 1996-11-26 1998-06-04 Valmet Corporation Multi-layer headbox for a paper machine/board machine
DE19723861A1 (en) * 1997-06-06 1998-12-10 Voith Sulzer Papiermasch Gmbh Stock inlet for delivering pulpy fibre suspension e.g. to paper production machine
EP1591585A1 (en) * 2004-04-30 2005-11-02 Vaahto OY Apparatus for controlling medium flow
EP2505711A3 (en) * 2011-03-31 2014-02-19 Bellmer Vaahto Paper Machinery Oy Feeder channel for diluting fluid

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19627669C2 (en) * 1996-07-10 2001-03-01 Stora Enso Publication Paper A Process for improving printing paper
DE19736047A1 (en) * 1997-08-20 1999-02-25 Voith Sulzer Papiermasch Gmbh Device and method for controlling or regulating the basis weight of a paper or cardboard web
DE19922817A1 (en) * 1999-05-19 2000-11-23 Voith Sulzer Papiertech Patent Device and method for controlling or regulating the basis weight of a paper or cardboard web
DE19926805A1 (en) * 1999-06-12 2000-12-14 Voith Sulzer Papiertech Patent Stock inlet for a papermaking machine etc has one or more fluid injectors at the turbulence tubes to inject controlled fluid doses with min effect on the total suspension vol flow
US6270625B1 (en) * 1999-06-29 2001-08-07 The Mead Corporation Method for manufacturing colored stripped paper
DE102005051656A1 (en) * 2005-10-28 2007-05-03 Voith Patent Gmbh Method and device for producing a fibrous web

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2548795A1 (en) * 1975-09-30 1977-03-31 Escher Wyss Gmbh PROCESS FOR MANUFACTURING A RAIL-SHAPED MATERIAL AND MACHINE FOR EXECUTING THE PROCESS
DE2912152A1 (en) * 1979-03-28 1980-10-09 Fr Schiettinger Niederlassung Regulation of superficial weight transverse profile of recycled paper - by diluting water flow determined by humidity meter
US4539075A (en) * 1983-01-04 1985-09-03 Oy Tampella Ab Lapintie Perforated sheet for the head box of a paper machine
WO1986001844A1 (en) * 1984-09-19 1986-03-27 Sulzer-Escher Wyss Gmbh Headbox system for a paper machine, and process for its operation
WO1993022495A1 (en) * 1992-04-25 1993-11-11 Sulzer-Escher Wyss Gmbh Headbox arrangement for a paper machine

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1338094A (en) * 1920-04-27 Paper-making
DE1236922B (en) * 1962-04-12 1967-03-16 Karlstad Mekaniska Ab Headbox for paper machines
US3407114A (en) * 1965-01-04 1968-10-22 Paul F. Springuel Cross machine control in papermaking
US3850265A (en) * 1970-08-21 1974-11-26 Sherwin Williams Co Lubricating device
US3791918A (en) * 1972-03-08 1974-02-12 Valmet Oy Headbox of a paper making machine having multiple, vertically inclined vanes
GB1431603A (en) * 1973-11-26 1976-04-14 Wiggins Teape Ltd Forming non-woven fibrous material
US3970513A (en) * 1974-04-10 1976-07-20 Valmet Oy Steam supplying structure for opposing build-up of matter in headboxes
JPS6055639B2 (en) * 1979-02-02 1985-12-05 三菱重工業株式会社 Pressure pulsation absorber
FI62151C (en) * 1981-04-07 1982-11-10 Ahlstroem Oy FOERFARANDE OCH ANORDNING FOER MATNING AV EN FIBERSUSPENSION PAO EN BANFORMNINGSANORDNINGS VIRA
DE3639823A1 (en) * 1986-11-21 1988-06-01 Voith Gmbh J M Headbox for papermachines or the like
DE3715554A1 (en) * 1987-05-09 1988-12-01 Voith Gmbh J M Paper-making stock inlet - is divided to form stronger web edges to prevent flutter
DE3802298A1 (en) * 1987-06-09 1988-12-22 Peter G Mercer METHOD AND DEVICE FOR IMPROVING THE HOMOGENITY OF FIBER DISTRIBUTION IN THE MACHINE MANUFACTURING OF A FIBROUS MATERIAL
DE3741603A1 (en) * 1987-12-09 1989-06-22 Voith Gmbh J M FABRIC DRAIN FOR A PAPER MACHINE OR THE LIKE.
AT392989B (en) * 1988-05-17 1991-07-25 Voith Ag J M FABRIC DRAIN FOR PAPER MACHINES
DE9109313U1 (en) * 1991-07-27 1991-09-26 J.M. Voith Gmbh, 7920 Heidenheim Device for guiding a moving web
DE9205637U1 (en) * 1992-04-25 1992-06-11 J.M. Voith Gmbh, 7920 Heidenheim Headbox for producing a paper web with variable injection

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2548795A1 (en) * 1975-09-30 1977-03-31 Escher Wyss Gmbh PROCESS FOR MANUFACTURING A RAIL-SHAPED MATERIAL AND MACHINE FOR EXECUTING THE PROCESS
DE2912152A1 (en) * 1979-03-28 1980-10-09 Fr Schiettinger Niederlassung Regulation of superficial weight transverse profile of recycled paper - by diluting water flow determined by humidity meter
US4539075A (en) * 1983-01-04 1985-09-03 Oy Tampella Ab Lapintie Perforated sheet for the head box of a paper machine
WO1986001844A1 (en) * 1984-09-19 1986-03-27 Sulzer-Escher Wyss Gmbh Headbox system for a paper machine, and process for its operation
WO1993022495A1 (en) * 1992-04-25 1993-11-11 Sulzer-Escher Wyss Gmbh Headbox arrangement for a paper machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998023812A1 (en) * 1996-11-26 1998-06-04 Valmet Corporation Multi-layer headbox for a paper machine/board machine
DE19723861A1 (en) * 1997-06-06 1998-12-10 Voith Sulzer Papiermasch Gmbh Stock inlet for delivering pulpy fibre suspension e.g. to paper production machine
EP1591585A1 (en) * 2004-04-30 2005-11-02 Vaahto OY Apparatus for controlling medium flow
US7661651B2 (en) 2004-04-30 2010-02-16 Vaathto Oy Apparatus for controlling medium flow
EP2505711A3 (en) * 2011-03-31 2014-02-19 Bellmer Vaahto Paper Machinery Oy Feeder channel for diluting fluid

Also Published As

Publication number Publication date
JPH0835189A (en) 1996-02-06
EP0674042B1 (en) 1998-10-21
DE4409415C5 (en) 2005-02-17
CA2144922A1 (en) 1995-09-19
ATE172507T1 (en) 1998-11-15
DE4409415A1 (en) 1995-09-28
FI951267A (en) 1995-09-19
FI112260B (en) 2003-11-14
FI951267A0 (en) 1995-03-17
DE59503965D1 (en) 1998-11-26
DE4409415C2 (en) 1996-08-08
US5900121A (en) 1999-05-04

Similar Documents

Publication Publication Date Title
EP0597871B1 (en) Cutting insert and drilling tool for drilling in solid material
DE3727843C2 (en) Device for generating liquid jets
EP0315091B1 (en) Ink baffle in an ink reservoir of a rotary printing machine
DE3729216A1 (en) HYDRAULIC UNIT
DE2310979A1 (en) Cell wheel for separating and distributing granular material
DE4409415C2 (en) Metering device for a headbox of a paper machine
DE4416909C2 (en) Headbox for a paper machine
DE4416898C2 (en) Headbox for a paper machine with local admixing of fluid
DE2707134C2 (en)
DE4002304A1 (en) Paper forming stretch
CH659601A5 (en) ADJUSTABLE CHOCOLATE FOR CONTINUOUS CASTING PLANTS.
DE4437181A1 (en) Head box for a paper machine
DE2750499C3 (en) Sorter for fiber suspension
EP0600435B1 (en) Ductor knife segment and ductor knife holder for an ink fountain of a rotary printing machine
EP0536649A1 (en) Apparatus for applying a coating colour onto a fibrous web
DE10242907B4 (en) Suction roll for a paper machine
DE10351973B4 (en) Roll part of a planetary roller extruder
DE9416731U1 (en) Headbox for a paper machine
DE3018729A1 (en) Liq. and powder simultaneously fed without clogging - or agglomeration into processing machines such as extruders
DE19630477A1 (en) Open-end spinning device
DE4337342A1 (en) Device for cooling rolled strips
DE4433829C2 (en) Pressure beams for sawing machines
DE4133501C2 (en) Device for applying coating color on a fibrous web
DE102019114847B4 (en) Device for receiving a section of cable
EP0138032A2 (en) Tube mill

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE FR GB SE

17P Request for examination filed

Effective date: 19951010

17Q First examination report despatched

Effective date: 19961025

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR GB SE

REF Corresponds to:

Ref document number: 172507

Country of ref document: AT

Date of ref document: 19981115

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59503965

Country of ref document: DE

Date of ref document: 19981126

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 19981216

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: VOITH SULZER PAPIERTECHNIK PATENT GMBH

ET Fr: translation filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19990122

Year of fee payment: 5

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 19990215

Year of fee payment: 5

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000224

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20000224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20001031

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20040220

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20040223

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20040310

Year of fee payment: 10

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050224

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050225

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050901

EUG Se: european patent has lapsed